<ul class="nav pull-right">
    <li><a href="/" target="_blank">Home page</a></li>
    <li class="divider-vertical"></li>
    <li class="dropdown">
        <a href="javascipt:void(0)" class="dropdown-toggle" data-toggle="dropdown">System <b class="caret"></b></a>
        <ul class="dropdown-menu">
            <li><a href="<?php echo $this->url(array('module' => 'admin', 'controller' => 'user', 'action' => 'index'), 'default', true); ?>">Manage Users</a></li>
            <li class="divider"></li>
            <li class="nav-header">Nav header</li>
            <li><a href="javascipt:void(0)">Separated link</a></li>
            <li><a href="javascipt:void(0)">One more separated link</a></li>
        </ul>
    </li>
</ul>